Nissan Q&A

1992 Nissan 240SX Question: do i have a fuel system problem?

i have a 92 nissan 240sx and a couple of months ago it started chugging reall bad so i changed the fuel filter and it helped but started again a couple of wks later and i let it get down to the red light coming on for the gas and after that it started dying despite putting the walmart gas cleaner in from the pump. it started dying when i came to a stop and i put
some fuel cleaner in from oreillys and it did good for a short distance then it started again with the chugging and dying so i changed the fuel pump and it didnt help, so i changed the filter again after it wouldnt start-hasnt done that before but is just turning over briefly then conking out and does the conking out faster when i press the gas. checked the plugs and dad said they look normal-a lil charred but no gas smell. is there some electrical thing i need to check cuz those fuel injectors are 85 a pop and i got 4 and i am hoping it doesnt come down to doing that, i might have to take it to a mechanic to see if they can do a diagnostic...but that has to wait til payday. but any info would be great!!!!!